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On the Autistic Spectrum Disorder concordance rates of twins and non-twin siblings
H V Bohm1, M G Stewart, A M Healy
1Department of Physics and Astronomy, Wayne State University, Detroit, MI 48202, USA.
Abstract:
Using the Interactive Autism Network Research Database, the Autistic Spectrum Disorder concordance rates for twins and non-twin siblings were calculated. For males, females and both genders together, the concordance rate for dizygotic twins is approximately twice that of non-twin siblings. We also determined that the concordance rate for non-twin siblings decreases as the interval between pregnancies increases. Our results appear to indicate that the uterine environment may contribute to autism concordance rates.
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